The rise of England's football hooligans

Violence between English football fans began to spread rapidly in the 1970s. Witness hears from two supporters - Cass Pennant and Dougie Brimson. What made them became involved and why did they later step back from violence?

(Photo: Police take precautionary measures to prevent violence at a football match at White Hart Lane between Tottenham and Liverpool in 1971. Credit: Photo by Leonard Burt/Central Press/Getty Images)